212100002202121 has 8 divisors (see below), whose sum is σ = 236762793156384. Its totient is φ = 188334040009920.

The previous prime is 212100002202037. The next prime is 212100002202149. The reversal of 212100002202121 is 121202200001212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212100002202121 - 2¹⁹ = 212100001677833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212100002202095 and 212100002202104.

It is not an unprimeable number, because it can be changed into a prime (212100002202161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224207190016 + ... + 224207190961.

It is an arithmetic number, because the mean of its divisors is an integer number (29595349144548).

Almost surely, 2^{212100002202121} is an apocalyptic number.

It is an amenable number.

212100002202121 is a deficient number, since it is larger than the sum of its proper divisors (24662790954263).

212100002202121 is a wasteful number, since it uses less digits than its factorization.

212100002202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448414381031.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212100002202121 its reverse (121202200001212), we get a palindrome (333302202203333).

The spelling of 212100002202121 in words is "two hundred twelve trillion, one hundred billion, two million, two hundred two thousand, one hundred twenty-one".